231603191 has 2 divisors, whose sum is σ = 231603192. Its totient is φ = 231603190.

The previous prime is 231603167. The next prime is 231603241. The reversal of 231603191 is 191306132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231603191 - 2²² = 227408887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231603191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231603101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115801595 + 115801596.

It is an arithmetic number, because the mean of its divisors is an integer number (115801596).

Almost surely, 2^231603191 is an apocalyptic number.

231603191 is a deficient number, since it is larger than the sum of its proper divisors (1).

231603191 is an equidigital number, since it uses as much as digits as its factorization.

231603191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 231603191 is about 15218.5147435615. The cubic root of 231603191 is about 614.1128425267.

The spelling of 231603191 in words is "two hundred thirty-one million, six hundred three thousand, one hundred ninety-one".